superlusolver.h

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/*
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 *
 *
 *             OOFEM : Object Oriented Finite Element Code
 *
 *               Copyright (C) 1993 - 2025   Borek Patzak
 *
 *
 *
 *       Czech Technical University, Faculty of Civil Engineering,
 *   Department of Structural Mechanics, 166 29 Prague, Czech Republic
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#ifndef superlusolver_h
#define superlusolver_h
 
#include "sparselinsystemnm.h"
#include "sparsemtrx.h"
#include "convergedreason.h"
#include "floatarray.h"
#include "SUPERLU_MT/include/slu_mt_ddefs.h"
 
#define _IFT_SuperLUSolver_Name "superlu"
#define _IFT_SuperLUSolver_Permcspec "permcspec"
 
namespace oofem {
class Domain;
class EngngModel;
class FloatMatrix;
class OOFEM_EXPORT SuperLUSolver : public SparseLinearSystemNM
{
private:
    SparseMtrx::SparseMtrxVersionType lhsVersion; // timestamp of existing decomposition
    SuperMatrix A, L, U;
    bool AAllocated=false, LAllocated=false, UAllocated=false;
    bool permAllocated = false;
    int_t *perm_c;
    int_t *perm_r;
    int_t permc_spec;
    
public:
    SuperLUSolver(Domain * d, EngngModel * m);
    virtual ~SuperLUSolver();
    ConvergedReason solve(SparseMtrx &A, FloatArray &b, FloatArray &x) override;
    SparseMtrxType giveRecommendedMatrix(bool symmetric) const override { return SMT_CompCol; }
 
 
    void initializeFrom(InputRecord &ir) override;
    const char *giveClassName() const override { return "SuperLUSolver"; }
    LinSystSolverType giveLinSystSolverType() const override { return ST_SuperLU_MT; }
 
private:
 
    int_t cholnzcnt(int_t neqns, int_t *xadj, int_t *adjncy, int_t *perm, int_t *invp, int_t *etpar, int_t *colcnt, int_t *nlnz, int_t *part_super_L);
    void convertRhs(SuperMatrix *A, FloatArray &x);
    int_t dPrint_CompCol_Matrix(SuperMatrix *A);
    int_t dPrint_Dense_Matrix(SuperMatrix *A);
};
} // end namespace oofem
#endif // imlsolver_h